Voltage conversion system and vehicle

Abstract

The utility model provides a voltage conversion system and a vehicle. The voltage conversion system comprises a vehicle body controller, a driving unit and a voltage conversion circuit. And the vehicle body controller controls the voltage conversion system to operate. The driving unit is used for being connected with a steering executing mechanism. The driving unit is used for outputting a steering driving signal when triggered, and the steering driving signal is used for driving the steering executing mechanism to steer. The voltage conversion circuit is provided with an input end, a first output end and a second output end; the voltage conversion circuit is used for converting a power supply voltage into a first voltage and a second voltage; the first output end is electrically connected with the vehicle body controller and used for outputting first voltage to supply power to the vehicle body controller; the second output end is electrically connected with the driving unit and used for outputting second voltage to supply power to the driving unit; the first voltage is less than the second voltage. Multiple kinds of voltage output can be achieved through one voltage conversion circuit, power can be supplied to the driving unit and the automobile body controller at the same time, and redundancy of a power supply system is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and particularly to a voltage conversion system and a vehicle. Background Art

[0002] Currently, the electrical devices on vehicles are usually 12V or 24V. However, with the development of new energy vehicle technologies, the types of electrical appliances in the vehicle's low-voltage system are increasing. The implementation of some new technical solutions also requires a 48V system to improve product performance and technological advancement.

[0003] Since there are electrical devices with different voltages on the vehicle (such as 12V and 48V), multiple sets of voltage conversion devices (DCDC) need to work in parallel. As shown in Figure 1 It is necessary to divide into multiple voltage circuits starting from the high-voltage power distribution unit, and multiple DCDCs also need to work in parallel, resulting in high costs, difficult layout, and increased development difficulty. Utility Model Content

[0004] In order to solve the problems in the prior art, the present application provides a voltage conversion system and a vehicle, which can achieve multiple voltage outputs and reduce the redundancy of the power supply system.

[0005] The present application provides a voltage conversion system, and the voltage conversion system includes:

[0006] A body controller for controlling the operation of the voltage conversion system;

[0007] A drive unit for connecting to a steering actuator; the drive unit is configured to output a steering drive signal when triggered, and the steering drive signal is used to drive the steering actuator to steer;

[0008] A voltage conversion circuit having an input terminal, a first output terminal, and a second output terminal; the input terminal is used to connect to a supply voltage, and the voltage conversion circuit is configured to convert the supply voltage into a first voltage and a second voltage; the first output terminal is electrically connected to the body controller and is used to output the first voltage to supply power to the body controller; the second output terminal is electrically connected to the drive unit and is used to output the second voltage to supply power to the drive unit; the first voltage is greater than the second voltage.

[0009] In one embodiment, the voltage conversion circuit includes a first transformer circuit and a second transformer circuit;

[0010] The input terminal of the first transformer circuit is used to connect to the supply voltage, and the output terminal of the first transformer circuit is the first output terminal of the voltage conversion circuit; the first transformer circuit is configured to convert the supply voltage into the first voltage and output it;

[0011] The input end of the second voltage conversion circuit is electrically connected to the output end of the first voltage conversion circuit, and the output end of the second voltage conversion circuit is the second output end of the voltage conversion circuit; the second voltage conversion circuit is used to convert the first voltage into the second voltage and output it.

[0012] In one embodiment, the first voltage conversion circuit includes a first switching component, a first inductor, and a first capacitor;

[0013] The first end of the first switching component is used to access the supply voltage, the second end of the first switching component is used to receive a first control signal, the third end of the first switching component is electrically connected to the first end of the first inductor, the second end of the first inductor is electrically connected to the first end of the first capacitor to form the first output end of the voltage conversion circuit, and the second end of the first capacitor is grounded; the first control signal is used to control the conduction / turn-off of the first switching component;

[0014] The second voltage conversion circuit includes a second switching component, a second inductor, and a second capacitor;

[0015] The first end of the second switching component is electrically connected to the second end of the first inductor, the second end of the second switching component is used to receive a second control signal, the third end of the second switching component is electrically connected to the first end of the second inductor, the second end of the second inductor is electrically connected to the first end of the second capacitor to form the second output end of the voltage conversion circuit, and the second end of the second capacitor is grounded; the second control signal is used to control the conduction / turn-off of the second switching component.

[0016] In one embodiment, the voltage conversion circuit further includes a control circuit;

[0017] The control circuit has a first output end and a second output end; the first output end of the control circuit is electrically connected to the second end of the first switching component, and the first output end of the control circuit is used to output the first control signal; the second output end of the control circuit is electrically connected to the second end of the second switching component, and the second output end of the control circuit is used to output the second control signal.

[0018] In one embodiment, the voltage conversion circuit further includes a third voltage conversion circuit;

[0019] The input end of the third voltage conversion circuit is electrically connected to the output end of the first voltage conversion circuit, and the output end of the third voltage conversion circuit is electrically connected to the input end of the second voltage conversion circuit; the third voltage conversion circuit is used to convert the first voltage into a third voltage, and the second voltage conversion circuit is used to convert the third voltage into the second voltage; the third voltage is less than the first voltage and greater than the second voltage.

[0020] In one embodiment, the number of the third voltage conversion circuits is multiple; the third voltages output by the multiple third voltage conversion circuits are different from each other.

[0021] In one embodiment, the third voltage conversion circuit includes a third switching component, a third inductor, and a third capacitor; the control circuit further has a third output terminal, and the third output terminal of the control circuit is used for outputting the third control signal;

[0022] The first end of the third switching component is used for accessing the power supply voltage, the second end of the third switching component is used for receiving the third control signal, the third end of the third switching component is electrically connected to the first end of the third inductor, the second end of the third inductor is electrically connected to the first end of the third capacitor to form the third output terminal of the voltage conversion circuit, and the second end of the third capacitor is grounded; the third control signal is used for controlling the third switching component to conduct / disconnect.

[0023] In one embodiment, the voltage conversion circuit further includes a voltage detection circuit;

[0024] The voltage detection circuit is electrically connected to the control circuit; the voltage detection circuit is used for detecting the voltage at the output terminal of the first voltage conversion circuit, the voltage at the output terminal of the second voltage conversion circuit, and the voltage at the output terminal of the third voltage conversion circuit;

[0025] The control circuit is used for controlling the first switching component to disconnect when the voltage at the output terminal of the first voltage conversion circuit is greater than a first preset voltage; controlling the second switching component to disconnect when the voltage at the output terminal of the second voltage conversion circuit is greater than a second preset voltage; and controlling the third switching component to disconnect when the voltage at the output terminal of the third voltage conversion circuit is greater than a third preset voltage.

[0026] In one embodiment, the voltage conversion circuit further includes a fuse circuit;

[0027] The fuse circuit has a first voltage detection terminal, a second voltage detection terminal, a third voltage detection terminal, a first voltage input terminal, a second voltage input terminal, a third voltage input terminal, a first voltage output terminal, a second voltage output terminal, and a third voltage output terminal;

[0028] The first voltage detection terminal is used for receiving the voltage at the output terminal of the first voltage conversion circuit, and the second voltage detection terminal is used for receiving the voltage at the output terminal of the second voltage conversion circuit;

[0029] The first voltage input terminal is electrically connected to the output terminal of the first voltage conversion circuit, and the first voltage output terminal is used to output the first voltage; the second voltage input terminal is electrically connected to the output terminal of the second voltage conversion circuit, and the second voltage output terminal is used to output the second voltage; the third voltage input terminal is electrically connected to the output terminal of the third voltage conversion circuit, and the third voltage output terminal is used to output the third voltage.

[0030] The fuse circuit is used to disconnect the path between the first voltage input terminal and the first voltage output terminal when the voltage at the output terminal of the first voltage conversion circuit is greater than the first preset voltage for the first preset duration; to disconnect the path between the second voltage input terminal and the second voltage output terminal when the voltage at the output terminal of the second voltage conversion circuit is greater than the second preset voltage for the second preset duration; and to disconnect the path between the third voltage input terminal and the third voltage output terminal when the voltage at the output terminal of the third voltage conversion circuit is greater than the third preset voltage for the third preset duration.

[0031] The present application also provides a vehicle, which includes the above voltage conversion system.

[0032] The present application can achieve multiple voltage outputs through a single voltage conversion circuit, which can supply power to the drive unit and the body controller simultaneously, reducing the redundancy of the power supply system. Moreover, the high-voltage input interface and the low-voltage output interface of the voltage conversion circuit are unified, making it easier for electrical equipment to be mounted, and saving the length and complexity of the wiring harness, which can reduce costs. Description of the Drawings

[0033] Figure 1 It is a circuit structure diagram of a voltage conversion device in the prior art.

[0034] Figure 2 It is a schematic module structure diagram of an embodiment of the voltage conversion system of the present application.

[0035] Figure 3 It is a structure diagram of an embodiment of the vehicle of the present application.

[0036] Figure 4 It is a structure diagram of an embodiment of the voltage conversion circuit of the present application.

[0037] Figure 5 It is a structure diagram of another embodiment of the voltage conversion circuit of the present application.

[0038] Figure 6 It is a structure diagram of an embodiment of the voltage detection circuit and the fuse circuit of the present application.

[0039] Figure 7 It is a structure diagram of an embodiment of the fuse circuit of the present application.

[0040] Description of Main Component Symbols

[0041] Voltage Conversion System 100, Body Controller 110

[0042] Drive Unit 120, Voltage Conversion Circuit 130

[0043] Active Stabilizer Bar 122, Headlamp 140

[0044] First Transformer Circuit 131, Second Transformer Circuit 132

[0045] First Switching Component Q1, First Inductor L1

[0046] First Capacitor C1, Second Switching Component Q2

[0047] Second Inductor L2, Second Capacitor C2

[0048] Third Transformer Circuit 133, Third Switching Component Q3

[0049] Third Inductor L3, Third Capacitor C3

[0050] Control Circuit 134, Voltage Detection Circuit 135

[0051] Fuse Circuit 136, Fuse Controller U1

[0052] First Switching Transistor Q4, Second Switching Transistor Q5

[0053] First Voltage A1, Second Voltage A2

[0054] Third Voltage A3, First Control Signal T1

[0055] Second Control Signal T2, Third Control Signal T3

[0056] Third Switching Transistor Q6, First Diode D1

[0057] Second Diode D2, Third Diode D3

[0058] Steer-by-Wire Unit 121, Vehicle 10

[0059] Instrument Panel 150

[0060] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific Embodiments

[0061] The following description will describe the content of the present application more comprehensively with reference to the accompanying drawings. The exemplary embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Like reference numerals denote the same or similar components.

[0062] The terms used herein are for the purpose of describing particular exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. Further, when used herein, "comprising" and / or "including" and / or "having", integers, steps, operations, components and / or components, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0063] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Further, unless clearly defined herein, terms such as those defined in a general dictionary should be construed to have a meaning consistent with their meaning in the relevant art and the content of this application, and will not be construed as idealized or overly formal meanings.

[0064] The following will describe the exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; and the same or similar components will be denoted by the same or similar reference numerals or similar technical terms.

[0065] Refer to Figure 2 and Figure 3, this application proposes a voltage conversion system 100, and the voltage conversion system 100 includes a body controller 110, a drive unit 120, and a voltage conversion circuit 130. The body controller 110 is used to control the operation of the voltage conversion system 100. The drive unit 120 is used to connect to a steering actuator; the drive unit 120 is used to output a steering drive signal when triggered, and the steering drive signal is used to drive the steering actuator to steer. The voltage conversion circuit 130 has an input terminal, a first output terminal, and a second output terminal; the input terminal is used to connect to a supply voltage, and the voltage conversion circuit 130 is used to convert the supply voltage into a first voltage A1 and / or a second voltage A2; the first output terminal is electrically connected to the drive unit 120 and is used to output the first voltage A1 to supply power to the drive unit 120; the second output terminal is electrically connected to the body controller 110 and is used to output the second voltage A2 to supply power to the body controller 110; the first voltage A1 is greater than the second voltage A2.

[0066] In this embodiment, the voltage conversion system 100 can be applied to a vehicle, for example, applied to Figure 2 the vehicle 10 shown. The vehicle 10 can be an electric vehicle or a hybrid vehicle. The body controller 110 can be an electronic control unit (ECU) in the vehicle 10 and is used to control the instrument panel 150, electric vehicle windows, electric rearview mirrors, air conditioners, anti-theft locking systems, central locking systems, defrosting devices, etc. in the vehicle 10. The body controller 110 can also be connected and communicate with other in-vehicle control units in the vehicle 10 through a bus.

[0067] In one embodiment, the drive unit 120 can include a motor. By supplying power to the motor through the output of the larger first voltage A1, the voltage conversion circuit 130 can increase the output power of the motor in the constant power stage and meet the power demand of the motor load.

[0068] In one embodiment, the drive unit 120 may include a wire-controlled steering unit 121. The wire-controlled steering unit 121 may include a steering wheel, a torque sensor, a steering angle sensor, a steering controller, and a steering motor. The torque sensor is used to detect the torque applied to the steering wheel by the driver. The steering angle sensor is used to detect the rotation angle of the steering wheel. The torque sensor and the steering angle sensor convert the detected driver torque and the steering wheel angle into electrical signals and input them into the steering controller. The steering controller may also receive wheel motion state signals collected by other sensors, such as vehicle speed, longitudinal acceleration, yaw angular velocity, etc. Based on these signals, the steering controller may process the steering wheel angle and torque signals, and send control instructions to the steering motor to achieve reasonable steering. The steering actuator is connected between the steering motor and the wheel, and the steering motor rotates to drive the steering actuator to drive the wheel to rotate. In addition, the steering controller may also send corresponding torque instructions to the aligning torque motor based on the wheel information collected by the wheel angle sensor and the state information of the voltage conversion system 100 to simulate the road feedback information and provide the driver with real-time road feel.

[0069] In one embodiment, the driving unit 120 may further include an active stabilizer bar 122. The active stabilizer bar 122 is electrically connected to the second output terminal of the voltage conversion circuit 130, and the second voltage A2 is also used to supply power to the active stabilizer bar 122; the active stabilizer bar 122 is used to adjust the roll angle of the vehicle body.

[0070] The active stabilizer bar 122 may include a stabilizer controller, a stabilizer drive motor, and a stabilizer bar. When the vehicle 10 is traveling on a curve, the centrifugal force will generate a roll moment on the vehicle body 10. The stabilizer controller may control the stabilizer drive motor to output a corresponding drive signal according to signals such as the steering wheel angle, vehicle speed, lateral acceleration, and yaw rate, and apply a continuously variable initial roll angle or initial roll moment to each lateral stabilizer bar to control the tilt posture of the vehicle body, thereby keeping the vehicle body level.

[0071] It can be understood that within a certain range, the motor response rate and power performance increase with the increase of voltage. Therefore, currently, the drive unit 120 usually requires a relatively high operating voltage, while the body controller 110 usually selects a relatively low operating voltage for power supply. This requires the voltage conversion system 100 to provide at least two output voltages simultaneously. In this embodiment, the voltage conversion circuit 130 can output the first voltage A1 and the second voltage A2 simultaneously to supply power to the body controller 110 and the drive unit 120 respectively. The input end of the voltage conversion circuit 130 can be connected to the battery pack or the generator of the vehicle 10 to access the supply voltage, that is, the supply voltage can refer to the output voltage of the battery pack. The voltage conversion circuit 130 can step down the relatively high supply voltage, convert the supply voltage into the first voltage A1 and / or the second voltage A2, and output them through the first output end and the second output end of the voltage conversion circuit 130 respectively. In this way, multiple voltage outputs can be achieved through one voltage conversion circuit 130, reducing the redundancy of the power supply system. Moreover, the high-voltage input interface and the low-voltage output interface of the voltage conversion circuit 130 are unified, making it easier for electrical equipment to be mounted, saving the length and complexity of the wiring harness, and reducing costs.

[0072] Referring to Figure 4 and Figure 5 , in one embodiment, the voltage conversion circuit 130 includes a first voltage conversion circuit 131 and a second voltage conversion circuit 132. The input end of the first voltage conversion circuit 131 is used to access the supply voltage, and the output end of the first voltage conversion circuit 131 is the first output end of the voltage conversion circuit 130; the first voltage conversion circuit 131 is used to convert the supply voltage into the first voltage A1 and output it. The input end of the second voltage conversion circuit 132 is electrically connected to the output end of the first voltage conversion circuit 131, and the output end of the second voltage conversion circuit 132 is the second output end of the voltage conversion circuit 130; the second voltage conversion circuit 132 is used to convert the first voltage A1 into the second voltage A2 and output it.

[0073] In this embodiment, the first voltage conversion circuit 131 can be implemented by a step-up / step-down circuit, and the second voltage conversion circuit 132 can be implemented by a step-down circuit. The first voltage conversion circuit 131 and the second voltage conversion circuit 132 are connected in series. The supply voltage is converted into the first voltage A1 by the first voltage conversion circuit 131 and output from the output end of the first voltage conversion circuit 131. The second voltage conversion circuit 132 can further convert the first voltage A1 into the second voltage A2 and output it from the output end of the second voltage conversion circuit 132. In this way, the power supply requirements of different electrical equipment in the vehicle 10 for the first voltage A1 and the second voltage A2 can be met.

[0074] In one embodiment, the first voltage conversion circuit 131 includes a first switching component Q1, a first inductor L1, and a first capacitor C1. The first end of the first switching component Q1 is used to connect to a power supply voltage. The second end of the first switching component Q1 is used to receive a first control signal T1. The third end of the first switching component Q1 is electrically connected to the first end of the first inductor L1. The second end of the first inductor L1 is electrically connected to the first end of the first capacitor C1 to form the first output end of the voltage conversion circuit 130. The second end of the first capacitor C1 is grounded. The first control signal T1 is used to control the conduction / disconnection of the first switching component Q1. The second voltage conversion circuit 132 includes a second switching component Q2, a second inductor L2, and a second capacitor C2. The first end of the second switching component Q2 is electrically connected to the second end of the first inductor L1. The second end of the second switching component Q2 is used to receive a second control signal T2. The third end of the second switching component Q2 is electrically connected to the first end of the second inductor L2. The second end of the second inductor L2 is electrically connected to the first end of the second capacitor C2 to form the second output end of the voltage conversion circuit 130. The second end of the second capacitor C2 is grounded. The second control signal T2 is used to control the conduction / disconnection of the second switching component Q2.

[0075] In this embodiment, the first switching component Q1 can be implemented by a device with conduction and disconnection functions such as a MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) transistor or a triode. The second switching component Q2 can be implemented by a device with conduction and disconnection functions such as a MOS transistor or a triode.

[0076] The first control signal T1 can be a PWM (Pulse Width Modulation) signal. The first control signal T1 converts the power supply voltage into a first voltage A1 by controlling the first switching component Q1 to alternately switch and conduct. The magnitude of the output voltage of the first switching component Q1, i.e., the first voltage A1, can be adjusted by adjusting the duty cycle of the PWM signal. The first inductor L1 can play a role in reducing voltage when the first switching component Q1 is conducting and a role in freewheeling when the first switching component Q1 is disconnected. The first capacitor C1 is used to filter the first voltage A1. The first voltage conversion circuit 131 may further include a first diode D1. The first diode D1 has a unidirectional conduction characteristic and can form a freewheeling loop with the first inductor L1 and the first capacitor C1 when the first switching component Q1 is disconnected.

[0077] Similarly, the second control signal T2 can be a PWM signal. The second control signal T2 controls the second switching component Q2 to alternately switch on and conduct, converting the first voltage A1 into the second voltage A2. By adjusting the duty cycle of the PWM signal, the output voltage of the second switching component Q2, i.e., the magnitude of the second voltage A2, can be adjusted. The second inductor L2 can play a role in step-down when the second switching component Q2 is conducting and a role in freewheeling when the second switching component Q2 is disconnected. The second capacitor C2 is used to filter the second voltage A2. The second voltage conversion circuit 132 may further include a second diode D2. The second diode D2 has a unidirectional conduction characteristic and can form a freewheeling loop with the second inductor L2 and the second capacitor C2 when the second switching component Q2 is disconnected.

[0078] Referring to Figure 6 , in an embodiment, the voltage conversion circuit 130 further includes a control circuit 134. The control circuit 134 has a first output terminal and a second output terminal; the first output terminal of the control circuit 134 is electrically connected to the first switching component Q1 for outputting the first control signal T1; the second output terminal of the control circuit 134 is electrically connected to the second switching component Q2 for outputting the second control signal T2.

[0079] In this embodiment, the control circuit 134 can be implemented by using a chip with control functions such as a microprocessor or an FPGA (Field Programmable Gate Array). The control circuit 134 can be provided with multiple control interfaces to connect with multiple switching components. According to the program pre-written in the control circuit 134, corresponding control signals are output through different control interfaces to control the operation of multiple switching components, so as to realize simultaneously controlling multiple voltage conversion circuits to output different voltages.

[0080] In an embodiment, the voltage conversion circuit 130 further includes a third voltage conversion circuit 133. The input terminal of the third voltage conversion circuit 133 is electrically connected to the output terminal of the first voltage conversion circuit 131, and the output terminal of the third voltage conversion circuit 133 is electrically connected to the input terminal of the second voltage conversion circuit 132; the third voltage conversion circuit 133 is used to convert the first voltage A1 into a third voltage A3, and the second voltage conversion circuit 132 is used to convert the third voltage A3 into the second voltage A2; the third voltage A3 is less than the first voltage A1 and greater than the second voltage A2.

[0081] In this embodiment, the magnitudes of the first voltage A1, the second voltage A2, and the third voltage A3 can be set according to actual requirements. For example, the first voltage A1 can be set to 48V. The second voltage A2 can be set to 12V, and the third voltage A3 can be set to 24V.

[0082] There are more and more electrical appliances in the vehicle's low-voltage system. The implementation of some new technical solutions requires 48V electrical equipment, such as a steer-by-wire unit 121, an active stabilizer bar 122, etc., to improve product performance and technological advancement. There are also many 12V electrical equipment in the original vehicle platform, such as a body controller 110, various sensors, etc. At the same time, a 24V power supply voltage output is reserved to meet the power supply requirements of other electrical equipment.

[0083] In this way, a voltage conversion circuit 130 provides 48V and 12V power supply voltages simultaneously, and reserves a 24V power supply voltage output, solving the power supply problem of the new technical solution, making the new technical solution compatible with the original vehicle platform, improving the continuity of the original vehicle platform, and also facilitating the addition and expansion of new functions, thereby reducing various resource inputs such as costs and time. And the voltage conversion circuit 130 is realized by connecting multiple transformer circuits in series, simplifying the circuit structure. In vehicle applications, it can reduce the layout difficulty, and also save costs in terms of structural parts such as the housing and brackets.

[0084] In addition, the magnitudes of the first voltage A1, the second voltage A2, and the third voltage A3 can also be set to other values according to actual applications, which are not limited herein.

[0085] In an embodiment, the vehicle 10 further includes a vehicle lamp 140. The vehicle lamp 140 is electrically connected to the body controller 110 and the output terminal of the third transformer circuit 133 respectively, and the third voltage A3 is used to supply power to the vehicle lamp 140. In this embodiment, the body controller 110 can also control the turning on and off of the vehicle lamp 140 according to the user's designation.

[0086] In an embodiment, the number of the third transformer circuits 133 is multiple; the third voltages A3 output by the multiple third transformer circuits 133 are different from each other.

[0087] In this embodiment, the third transformer circuit 133 can be set to multiple according to actual needs to meet the power supply requirements of various electrical equipment on the vehicle 10.

[0088] In one embodiment, the third voltage conversion circuit 133 includes a third switching component Q3, a third inductor L3, and a third capacitor C3; the control circuit 134 further has a third output terminal, and the third output terminal of the control circuit 134 is used to output the third control signal T3. The first terminal of the third switching component Q3 is used to access the supply voltage, the second terminal of the third switching component Q3 is used to receive the third control signal T3, the third terminal of the third switching component Q3 is electrically connected to the first terminal of the third inductor L3, and the second terminal of the third inductor L3 is electrically connected to the first terminal of the third capacitor C3 to form the third output terminal of the voltage conversion circuit 130, and the second terminal of the third capacitor C3 is grounded; the third control signal T3 is used to control the third switching component Q3 to conduct / disconnect.

[0089] In this embodiment, the third control signal T3 converts the first voltage A1 into the third voltage A3 by controlling the third switching component Q3 to alternately switch and conduct. The output voltage of the third switching component Q3, that is, the magnitude of the third voltage A3, can be adjusted by adjusting the duty cycle of the PWM signal. The third inductor L3 can play a voltage reduction role when the third switching component Q3 is conducting, and a freewheeling role when the third switching component Q3 is disconnected. The third capacitor C3 is used to filter the first voltage A1. The third voltage conversion circuit 133 may further include a third diode D3. The third diode D3 has a unidirectional conduction characteristic, and when the third switching component Q3 is disconnected, it can form a freewheeling loop with the third inductor L3 and the third capacitor C3.

[0090] In one embodiment, the voltage conversion circuit 130 further includes a voltage detection circuit 135. The voltage detection circuit 135 is electrically connected to the control circuit 134; the voltage detection circuit 135 is used to detect the voltage at the output terminal of the first voltage conversion circuit 131, the voltage at the output terminal of the second voltage conversion circuit 132, and the voltage at the output terminal of the third voltage conversion circuit 133. The control circuit 134 is used to control the first switching component Q1 to disconnect when the voltage at the output terminal of the first voltage conversion circuit 131 is greater than a first preset voltage; control the second switching component Q2 to disconnect when the voltage at the output terminal of the second voltage conversion circuit 132 is greater than a second preset voltage; and control the third switching component Q3 to disconnect when the voltage at the output terminal of the third voltage conversion circuit 133 is greater than a first preset voltage.

[0091] In this embodiment, the voltage detection circuit 135 may include a plurality of voltage dividing circuits. The number of voltage dividing circuits can be set according to the number of voltage conversion circuits, and the voltage dividing circuits can be implemented by using a plurality of voltage dividing resistors.

[0092] For example, the voltage detection circuit 135 may include a first voltage dividing circuit, a second voltage dividing circuit, and a third voltage dividing circuit. The detection terminal of the first voltage dividing circuit may be connected to the first end or the second end of the first capacitor C1 to detect the voltage at the output terminal of the first voltage transformation circuit 131. The detection terminal of the second voltage dividing circuit may be connected to the first end of the second capacitor C2 or the second end of the first capacitor C1 to detect the voltage at the output terminal of the second voltage transformation circuit 132. The detection terminal of the third voltage dividing circuit may be connected to the first end or the second end of the third capacitor C3 to detect the voltage at the output terminal of the third voltage transformation circuit 133. The output terminals of the first voltage dividing circuit, the second voltage dividing circuit, and the third voltage dividing circuit are respectively electrically connected to the control circuit 134.

[0093] The control circuit 134 may adjust the corresponding control signals according to the voltages output by the first voltage dividing circuit, the second voltage dividing circuit, and the third voltage dividing circuit, so that the voltage output by the voltage transformation circuit meets the power supply requirements, realizes closed-loop control, and ensures that the electrical equipment operates at the optimal operating point.

[0094] In addition, if it is detected that the voltage at the output terminal of the first voltage transformation circuit 131 is greater than the first preset voltage, it indicates that the first voltage transformation circuit 131 may be overloaded, then the control circuit 134 controls the first switch component Q1 to disconnect and stops power supply. If it is detected that the voltage at the output terminal of the second voltage transformation circuit 132 is greater than the second preset voltage, it indicates that the second voltage transformation circuit 132 may be overloaded, then the control circuit 134 controls the second switch component Q2 to disconnect and stops power supply. If it is detected that the voltage at the output terminal of the third voltage transformation circuit 133 is greater than the third preset voltage, it indicates that the third voltage transformation circuit 133 may be overloaded, then the control circuit 134 controls the third switch component Q3 to disconnect and stops power supply.

[0095] Among them, the first preset voltage, the second preset voltage, and the third preset voltage may be determined according to the fluctuation ranges of the first voltage A1, the second voltage A2, and the third voltage A3. For example, if the first voltage A1 is 12V, the first preset voltage may be set to 16V.

[0096] In one embodiment, the voltage conversion circuit 130 further includes a fusing circuit 136. The fusing circuit 136 has a first voltage detection terminal, a second voltage detection terminal, a third voltage detection terminal, a first voltage input terminal, a second voltage input terminal, a third voltage input terminal, a first voltage output terminal, a second voltage output terminal, and a third voltage output terminal. The first voltage detection terminal is used to receive the voltage at the output terminal of the first transformer circuit 131, the second voltage detection terminal is used to receive the voltage at the output terminal of the second transformer circuit 132, and the third voltage detection terminal is used to receive the voltage at the output terminal of the third transformer circuit 133. The first voltage input terminal is electrically connected to the output terminal of the first transformer circuit 131, and the first voltage output terminal is used to output the first voltage A1; the second voltage input terminal is electrically connected to the output terminal of the second transformer circuit 132, and the second voltage output terminal is used to output the second voltage A2; the third voltage input terminal is electrically connected to the output terminal of the third transformer circuit 133, and the third voltage output terminal is used to output the third voltage A3. The fusing circuit 136 is configured to disconnect the path between the first voltage input terminal and the first voltage output terminal when the voltage at the output terminal of the first transformer circuit 131 is greater than a first preset voltage for a first preset duration; disconnect the path between the second voltage input terminal and the second voltage output terminal when the voltage at the output terminal of the second transformer circuit 132 is greater than a second preset voltage for a second preset duration; and disconnect the path between the third voltage input terminal and the third voltage output terminal when the voltage at the output terminal of the third transformer circuit 133 is greater than a third preset voltage for a third preset duration.

[0097] In this embodiment, the fusing circuit 136 can be implemented by an electronic fusing device. The fusing circuit 136 can replace a traditional fuse, actively cut off the circuit in case of overload, and has the characteristic of being recoverable after the overload fault is eliminated.

[0098] For example, if the control circuit 134 fails to effectively control the output voltage of the transformer circuit, resulting in the voltage at the output terminal of the first transformer circuit 131 being greater than the first preset voltage for 100 ms, the fusing circuit 136 disconnects the path between the first voltage input terminal and the first voltage output terminal, and stops the output of the first voltage A1. Or, if the voltage at the output terminal of the second transformer circuit 132 is greater than the second preset voltage for 100 ms, the fusing circuit 136 disconnects the path between the second voltage input terminal and the second voltage output terminal, and stops the output of the second voltage A2. Or, if the voltage at the output terminal of the third transformer circuit 133 is greater than the third preset voltage for 100 ms, the fusing circuit 136 disconnects the path between the third voltage input terminal and the third voltage output terminal, and stops the output of the third voltage A3.

[0099] In this way, further serious faults can be avoided from occurring and damaging the electrical equipment of the vehicle 10.

[0100] Referring to Figure 7 , in one embodiment, the fusing circuit 136 may include a fusing controller U1, a first switching transistor Q4, a second switching transistor Q5, and a third switching transistor Q6. The first switching transistor Q4 is connected in series between a first voltage input terminal and a first voltage output terminal. The second switching transistor Q5 is connected in series between a second voltage input terminal and a second voltage output terminal. The third switching transistor Q6 is connected in series between a third voltage input terminal and a third voltage output terminal. A first voltage detection terminal, a second voltage detection terminal, and a third voltage detection terminal are respectively connected to the fusing controller U1. The fusing controller U1 may control the first switching transistor Q4 to turn off and stop outputting the first voltage A1 when the voltage at the first voltage detection terminal is greater than a first preset voltage for a first preset duration. The fusing controller U1 may also control the second switching transistor Q5 to turn off and stop outputting the second voltage A2 when the voltage at the second voltage detection terminal is greater than a second preset voltage for a second preset duration; and control the third switching transistor Q6 to turn off and stop outputting the third voltage A3 when the voltage at the third voltage detection terminal is greater than a third preset voltage for a third preset duration. Among them, the fusing controller U1 may be implemented by a chip with control functions such as a microprocessor, an FPGA, etc. The switching transistor may be implemented by an NMOS (N-Metal-Oxide-Semiconductor) transistor, a PMOS (P-Metal-Oxide-Semiconductor) transistor, etc. The fusing controller U1 may control the switching transistor to conduct by outputting a high / low level. The number of switching transistors may be set to more or less according to the number of voltage conversion circuits.

[0101] Referring to Figure 2 , the present application also proposes a vehicle 10, and the vehicle 10 includes the above-mentioned voltage conversion system 100.

[0102] For the detailed structure of the voltage conversion system 100, reference may be made to the above-mentioned embodiment, which will not be elaborated here; it can be understood that since the above-mentioned voltage conversion system 100 is used in the vehicle 10 of the present application, therefore, the embodiments of the vehicle 10 of the present application include all the technical solutions of all the embodiments of the above-mentioned voltage conversion system 100, and the achieved technical effects are also exactly the same, which will not be elaborated here.

[0103] In the above text, the specific implementation manners of the present application have been described with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that various changes and substitutions can be made to the specific implementation manners of the present application without departing from the spirit and scope of the present application. These changes and substitutions all fall within the scope defined by the present application.

Claims

1. A voltage conversion system (100), characterized in that, The voltage conversion system (100) includes: A body controller (110) for controlling the operation of the voltage conversion system (100); A drive unit (120) for connecting to a steering actuator; the drive unit (120) is configured to output a steering drive signal when triggered, and the steering drive signal is used to drive the steering actuator to steer; A voltage conversion circuit (130), the voltage conversion circuit (130) having an input terminal, a first output terminal, and a second output terminal; the input terminal is used to connect to a supply voltage, and the voltage conversion circuit (130) is configured to convert the supply voltage into a first voltage (A1) and a second voltage (A2); the first output terminal is electrically connected to the drive unit (120) for outputting the first voltage (A1) to supply power to the drive unit (120); the second output terminal is electrically connected to the body controller (110) for outputting the second voltage (A2) to supply power to the body controller (110); the first voltage (A1) is greater than the second voltage (A2).

2. The voltage conversion system (100) according to claim 1, characterized in that, The voltage conversion circuit (130) includes a first transformer circuit (131) and a second transformer circuit (132); The input terminal of the first transformer circuit (131) is used to connect to the supply voltage, and the output terminal of the first transformer circuit (131) is the first output terminal of the voltage conversion circuit (130); the first transformer circuit (131) is configured to convert the supply voltage into the first voltage (A1) and output it; The input terminal of the second transformer circuit (132) is electrically connected to the output terminal of the first transformer circuit (131), and the output terminal of the second transformer circuit (132) is the second output terminal of the voltage conversion circuit (130); the second transformer circuit (132) is configured to convert the first voltage (A1) into the second voltage (A2) and output it.

3. The voltage conversion system (100) according to claim 2, characterized in that, The first transformer circuit (131) includes a first switching component (Q1), a first inductor (L1), and a first capacitor (C1); The first end of the first switching component (Q1) is used to connect to the supply voltage, the second end of the first switching component (Q1) is used to receive a first control signal (T1), the third end of the first switching component (Q1) is electrically connected to the first end of the first inductor (L1), and the second end of the first inductor (L1) is electrically connected to the first end of the first capacitor (C1) to form the first output terminal of the voltage conversion circuit (130), and the second end of the first capacitor (C1) is grounded; the first control signal (T1) is used to control the conduction / turn-off of the first switching component (Q1); The second transformer circuit (132) includes a second switching component (Q2), a second inductor (L2), and a second capacitor (C2); The first end of the second switching component (Q2) is electrically connected to the second end of the first inductor (L1). The second end of the second switching component (Q2) is for receiving a second control signal (T2). The third end of the second switching component (Q2) is electrically connected to the first end of the second inductor (L2). The second end of the second inductor (L2) is electrically connected to the first end of the second capacitor (C2) to form the second output end of the voltage conversion circuit (130). The second end of the second capacitor (C2) is grounded. The second control signal (T2) is used to control the conduction / disconnection of the second switching component (Q2).

4. The voltage conversion system (100) according to claim 3, wherein The voltage conversion circuit (130) further includes a control circuit (134). The control circuit (134) has a first output end and a second output end. The first output end of the control circuit (134) is electrically connected to the second end of the first switching component (Q1), and the first output end of the control circuit (134) is for outputting the first control signal (T1). The second output end of the control circuit (134) is electrically connected to the second end of the second switching component (Q2), and the second output end of the control circuit (134) is for outputting the second control signal (T2).

5. The voltage conversion system (100) according to claim 4, characterized in that, The voltage conversion circuit (130) further includes a third voltage conversion circuit (133). The input end of the third voltage conversion circuit (133) is electrically connected to the output end of the first voltage conversion circuit (131), and the output end of the third voltage conversion circuit (133) is electrically connected to the input end of the second voltage conversion circuit (132). The third voltage conversion circuit (133) is used to convert the first voltage (A1) into a third voltage (A3), and the second voltage conversion circuit (132) is used to convert the third voltage (A3) into the second voltage (A2). The third voltage (A3) is less than the first voltage (A1) and greater than the second voltage (A2).

6. The voltage conversion system (100) according to claim 5, wherein The number of the third voltage conversion circuits (133) is multiple; the third voltages (A3) output by the multiple third voltage conversion circuits (133) are different from each other.

7. The voltage conversion system (100) according to claim 5, characterized in that, The third voltage conversion circuit (133) includes a third switching component (Q3), a third inductor (L3) and a third capacitor (C3). The control circuit (134) further has a third output end, and the third output end of the control circuit (134) is for outputting a third control signal (T3). The first end of the third switching component (Q3) is for accessing the supply voltage. The second end of the third switching component (Q3) is for receiving the third control signal (T3). The third end of the third switching component (Q3) is electrically connected to the first end of the third inductor (L3). The second end of the third inductor (L3) is electrically connected to the first end of the third capacitor (C3) to form the third output end of the voltage conversion circuit (130). The second end of the third capacitor (C3) is grounded. The third control signal (T3) is used to control the conduction / disconnection of the third switching component (Q3).

8. The voltage conversion system (100) according to claim 7, characterized in that, The voltage conversion circuit (130) further includes a voltage detection circuit (135). The voltage detection circuit (135) is electrically connected to the control circuit (134); the voltage detection circuit (135) is configured to detect the voltage at the output terminal of the first voltage transformation circuit (131), the voltage at the output terminal of the second voltage transformation circuit (132), and the voltage at the output terminal of the third voltage transformation circuit (133); The control circuit (134) is configured to control the first switch component (Q1) to turn off when the voltage at the output terminal of the first voltage transformation circuit (131) is greater than a first preset voltage; control the second switch component (Q2) to turn off when the voltage at the output terminal of the second voltage transformation circuit (132) is greater than a second preset voltage; and control the third switch component (Q3) to turn off when the voltage at the output terminal of the third voltage transformation circuit (133) is greater than a third preset voltage.

9. The voltage conversion system (100) according to claim 8, wherein, The voltage conversion circuit (130) further includes a fuse circuit (136); The fuse circuit (136) has a first voltage detection terminal, a second voltage detection terminal, a third voltage detection terminal, a first voltage input terminal, a second voltage input terminal, a third voltage input terminal, a first voltage output terminal, a second voltage output terminal, and a third voltage output terminal; The first voltage detection terminal is configured to receive the voltage at the output terminal of the first voltage transformation circuit (131), the second voltage detection terminal is configured to receive the voltage at the output terminal of the second voltage transformation circuit (132), and the third voltage detection terminal is configured to receive the voltage at the output terminal of the third voltage transformation circuit (133); The first voltage input terminal is electrically connected to the output terminal of the first voltage transformation circuit (131), and the first voltage output terminal is configured to output the first voltage (A1); the second voltage input terminal is electrically connected to the output terminal of the second voltage transformation circuit (132), and the second voltage output terminal is configured to output the second voltage (A2); the third voltage input terminal is electrically connected to the output terminal of the third voltage transformation circuit (133), and the third voltage output terminal is configured to output the third voltage (A3); The fuse circuit (136) is configured to disconnect the path between the first voltage input terminal and the first voltage output terminal when the voltage at the output terminal of the first voltage transformation circuit (131) is greater than the first preset voltage for a first preset duration; disconnect the path between the second voltage input terminal and the second voltage output terminal when the voltage at the output terminal of the second voltage transformation circuit (132) is greater than the second preset voltage for a second preset duration; and disconnect the path between the third voltage input terminal and the third voltage output terminal when the voltage at the output terminal of the third voltage transformation circuit (133) is greater than the third preset voltage for a third preset duration.

10. A vehicle (10), characterized in that, The vehicle includes the voltage conversion system (100) as described in any one of claims 1 to 9.

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